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Cromossomo Y
Until recently, the Y chromosome seemed to fulfill the role of
juvenile delinquent among human chromosomes – rich in junk, poor in
useful attributes, reluctant to socialize with its neighbors and with
an inescapable tendency to degenerate...
(Mark Jobling and Chris Tyler Smith 2003)
Cromossomo Y
•HERANÇA HAPLOTÍPICA
•95% REGIÃO NÃO RECOMBINANTE
•MARCADOR DE LINHAGEM PATRILÍNEA
•UTILIZAÇÃO EM CRIMES SEXUAIS
•CONFIRMAÇÃO DE PATERNIDADE
•IDENTIFICAÇÃO DE DESAPARECIDOS
•PESQUISA GENEALÓGICA, HISTÓRICA E
EVOLUTIVA
STR cromossomo YSTR cromossomo Y
linhagem paternalinhagem paterna
17 Y17 Y17 Y17 Y----STR lociSTR lociSTR lociSTR loci
Perfil Y-STR
Vantagens
–– ObtenObtençãção de perfil exclusivamente masculinoo de perfil exclusivamente masculino
–– Auxilia em separaAuxilia em separaçõções incompletas das fraes incompletas das fraçõçõeses
masculina e feminina em casos de crimes sexuaismasculina e feminina em casos de crimes sexuais
–– VerificaVerificaçãção do sexoo do sexo
Auxilia na anAuxilia na anáálise de misturas que contlise de misturas que contêêm:m:
–– SSêêmen de homens vasectomizados oumen de homens vasectomizados ou
azoospazoospéérmicosrmicos
–– MMúúltiplos doadores de sltiplos doadores de sêêmenmen
–– Misturas de diversos tipos de fluidos corporaisMisturas de diversos tipos de fluidos corporais
(n(nãão so sêêmen)men)
IDENTIFICAÇÃO DE DNA MASCULINO EM CASOS DE
CRIME SEXUAL
EXTENSÃO DE AMOSTRAS DE REFERÊNCIA EM
CASOS DE PESSOAS DESAPARECIDAS
Limitação
NNãão pode diferenciar indivo pode diferenciar indivííduos que dividem aduos que dividem a
mesma linhagem paternamesma linhagem paterna
Aplicações
PaternidadePaternidade
Descendente apresenta o haplDescendente apresenta o haplóótipo idtipo idêêntico ao seu paintico ao seu pai
DeterminaDeterminaçãção de Linhagem Paternao de Linhagem Paterna
Pode estabelecer relaPode estabelecer relaçãção de paternidade ao longo dao de paternidade ao longo da áárvorervore
genealgenealóógicagica
Estudos evolutivosEstudos evolutivos
Caso de crime sexual – cromossomo Y
Caso de crime sexual – STR autossômico
Identificação de DNA masculino em casos de crime sexual
Identificação de DNA masculino em casos de crime sexual

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Identificação de DNA masculino em casos de crime sexual

  • 1. Cromossomo Y Until recently, the Y chromosome seemed to fulfill the role of juvenile delinquent among human chromosomes – rich in junk, poor in useful attributes, reluctant to socialize with its neighbors and with an inescapable tendency to degenerate... (Mark Jobling and Chris Tyler Smith 2003)
  • 2. Cromossomo Y •HERANÇA HAPLOTÍPICA •95% REGIÃO NÃO RECOMBINANTE •MARCADOR DE LINHAGEM PATRILÍNEA •UTILIZAÇÃO EM CRIMES SEXUAIS •CONFIRMAÇÃO DE PATERNIDADE •IDENTIFICAÇÃO DE DESAPARECIDOS •PESQUISA GENEALÓGICA, HISTÓRICA E EVOLUTIVA
  • 3. STR cromossomo YSTR cromossomo Y linhagem paternalinhagem paterna
  • 4. 17 Y17 Y17 Y17 Y----STR lociSTR lociSTR lociSTR loci
  • 6. Vantagens –– ObtenObtençãção de perfil exclusivamente masculinoo de perfil exclusivamente masculino –– Auxilia em separaAuxilia em separaçõções incompletas das fraes incompletas das fraçõçõeses masculina e feminina em casos de crimes sexuaismasculina e feminina em casos de crimes sexuais –– VerificaVerificaçãção do sexoo do sexo Auxilia na anAuxilia na anáálise de misturas que contlise de misturas que contêêm:m: –– SSêêmen de homens vasectomizados oumen de homens vasectomizados ou azoospazoospéérmicosrmicos –– MMúúltiplos doadores de sltiplos doadores de sêêmenmen –– Misturas de diversos tipos de fluidos corporaisMisturas de diversos tipos de fluidos corporais (n(nãão so sêêmen)men)
  • 7. IDENTIFICAÇÃO DE DNA MASCULINO EM CASOS DE CRIME SEXUAL
  • 8. EXTENSÃO DE AMOSTRAS DE REFERÊNCIA EM CASOS DE PESSOAS DESAPARECIDAS
  • 9. Limitação NNãão pode diferenciar indivo pode diferenciar indivííduos que dividem aduos que dividem a mesma linhagem paternamesma linhagem paterna Aplicações PaternidadePaternidade Descendente apresenta o haplDescendente apresenta o haplóótipo idtipo idêêntico ao seu paintico ao seu pai DeterminaDeterminaçãção de Linhagem Paternao de Linhagem Paterna Pode estabelecer relaPode estabelecer relaçãção de paternidade ao longo dao de paternidade ao longo da áárvorervore genealgenealóógicagica Estudos evolutivosEstudos evolutivos
  • 10. Caso de crime sexual – cromossomo Y
  • 11. Caso de crime sexual – STR autossômico